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Related Experiment Videos

Improved exercise performance in persons with stable angina pectoris receiving diltiazem

K F Hossack, R A Bruce

    The American Journal of Cardiology
    |January 1, 1981
    PubMed
    Summary

    Diltiazem, a calcium channel blocker, significantly improved exercise performance in patients with chronic stable angina by increasing exercise duration and delaying symptom onset. Long-term use also maintained these benefits.

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    Area of Science:

    • Cardiology
    • Pharmacology

    Background:

    • Chronic stable angina limits exercise capacity.
    • Calcium channel blockers are used to manage cardiovascular conditions.

    Purpose of the Study:

    • To evaluate the effects of diltiazem on exercise performance in patients with chronic stable angina.
    • To compare diltiazem's efficacy against a placebo.

    Main Methods:

    • Randomized, double-blind, placebo-controlled study.
    • Ten patients with chronic stable angina participated over 7 weeks.
    • Diltiazem administered at 120, 180, and 240 mg/day.

    Main Results:

    • Diltiazem significantly increased total exercise duration and time to angina onset and S-T depression.

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  • Heart rate and diastolic blood pressure were reduced during submaximal exercise.
  • Reduced pressure-rate product is a potential mechanism for improved exercise duration.

    • Conclusions:

    • Diltiazem effectively improves exercise capacity in chronic stable angina patients.
    • Benefits were dose-dependent and sustained in long-term follow-up.
    • No reduction in electrocardiographic evidence of myocardial ischemia at peak exercise was observed.